How do I get an outgoing
paymentHash using LND REST API? I know that
GET /v1/payments returns all payments, but I would like to get one in particular, not all as there may be thousands. Thanks.
I don't think you can look up payments by their paymentHash but you can look up invoices which contain a lot of the same information using a paymentHash: https://api.lightning.community/rest/index.html#v1-invoice